Self-blowing torch



Sept. 4, 1923- 1,467.07()

F. P. SCH MITT SELF BLOWING TORCH Filed June 1, 1922 WITNESSESS mvm'pnJM @JM ATTORNEYS Patented Sept. 4, 1923..

warren s r eras FRANCIS P. SCHMITT,OF LEETSDALE, YPENNSYLVANIA, ASSIGNORTO PEERBLOW MANUFACTURING COMPANY, OF LEETSDALE, PENNSYLVANIA, ACORPORATION OF PENNSYLVANIA.

Application filed June 1,

T will whom it may concern:

Be it known that I, FRANCIS P. SGHMITT, a citizen of the United States,and a resident of Leetsdale, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in Self-BlowingTorches, of which the following is a specification.

This invention relates to a self-blowing torch, and particularly to adevice of this character adapted for use by electrical wiremen insplicing or for other similar purposes.

It is an object of the invention to provide a self-blowing torch whichis simple in construction, which comprises relatively few parts, and inwhich the parts are so arranged as to produce an effective heating flamein a relatively short time and in a highly ellicient manner.

It is a special object of the invention to provide a device of thecharacter referred to in which a constant supply of oxygen to theheating flame is secured so as to form a Bunsen flame.

It is a further special objectof the in vention to arrange the severalparts of the apparatus so as to dispose the superheater tube in the samevertical plane as the lighting and vaporizing tubes and in which thesuperheater tube Wlll extend well within the space between the saidlighting and vaporizing tubes thus utilizing the heat radiatedtherefrom. It is still a further object of the invention to provide asimple form of superheater tube not only disposed as above set forth,but which has a curved deflecting end which enables the heat fLom theflame and that radiated from the heated parts adjacent thereto to beutilized to the fullest extent.

In the accompanying drawings Fig. 1 is a front elevation of one form ofconstruction embodying the invention; Fig. 2 a vertical transversesectional view with parts. in elevation of the form illustrated in Fig.1; Fig. 3 ,a side elevation of a modification illustrating the preferredembodiment; and Fig. 4: a front elevation of the modified form shown inFig. 3.

In the drawings, the torch is illustrated as comprising the mainreceptacle or container 1, preferably cylindrical in form, having aSELF-BLOWINGTORCH.

1922. Serial No. 565,186.

,top and a bottom 3. The container 1 is provided with a partition 4which divides the same into two fuel chambers or compartments 5 and 6,the uppei fuel compartment serving as a supply for the vaporizing tube,and the lower fuel compartment 6 as a supply for the lighting-tube. Thecompart ments 5 and\ 6 are provided with the outlets 7 and 8,respectively, in the sides thereof,

which outlets are equipped with the suitable closure plugs 9 and 10,respectively. These outlets are utilized for filling the compartmentswhich may be conveniently done by holding the container 1 on its side ina substantially horizontal position with the closure plugs located atthe upper side thereof.

The top 2 and partition 4 are each providedwith an opening substantiallyin the center thereof through which extends a'tube 11 having the lowerend 12 thereof open and 4 in communication with the compartment. 6, theupper end of the tube 11 extending above the top 2 and forming alighting tube 13.

The lighting tube not only extends above the top 2 but is bent forwardlyand is curved throughout its extent, as clearly illustrated in Figs. 2and 3, the lighting tube 13 forming a continuation of the tube 11 andbeing open at its upper end 14. The wick 15 is disposed within the tube1113, said wick having its lower end depending within the compart ment 6and extending at its upper end within the opening 14 so that a light maybe applied thereto. Another comparatively small open tube 16 is carriedwithin the tube 1113, the lower end thereof being in communication withthe upper portion of the compartment 6 and its upper end positionedwithin the open end 14 of the lighting tube. This small tube serves torelieve any excess pressure of gas which may be formed within thecompartment 6 and conducts it to the lighting flame at the upper end ofthe tube 18, also functioning as a vent pipe to admit air to compartment6 A cap 17 is provided which is adapted to be placed in position overthe open end 14 of the lighting tube to extinguish the flame 'at the endthereof, the cap cooperating with a band 18 embracing the upper end ofthe lighting tube and adapted to be held in place by frictionalengagement with the said band. When the cap is not in position on theupper -ner similar to the lighting tube 13.

end of the lighting tube to extinguish the flame and prevent evaporationof the fuel, the same is disposed upon a knob 19, located at aconvenient position upon the top 2, as shown in Figs. 1 and 2. I

The top 2 is provided with a second opening in which the lower 0 en endof a vaporizing tube 20 is fixed, t e vaporizing tube extending upwardlyand forwardly, being curved throughout its entire extent in a H1121}?- evaporizing tube, however, is considerably longer than the lighting tubeand pro ects therebeyond, the two tubes being disposed 1n the samevertical plane, as shown in Fig. 1.

The outer end of the vaporizing tube 20 is 21 in the forward centralportion of which is mounted a screw plug 22, the plug 22 being pnovidedto facilitate the insertion of the wick 23 which completely fills thetube 20. The wick 23 depends within the fuel com partment 5 a sufiicientdistance to be constantly immersed in the fuel contained therein.

A U-shaped super-heater tube is indicated at 24, the limbs of whichextend from opposite sides f the cap 21, being in communication with theinterior of the vaporizing tube. The superheater tube is disposedbetween the lighting tube and vaporizing tube, ex tending a substantialdistance within the space between the said tubes and having its bridgeportion 25 located a substantial distance to the rear of-the openend 14of the lighting tube. The bridge portion25 is provided at its forwardslde and at a point midway between the limbs of the superheater tubewith a vapor or gas discharge outlet 26.

In the preferred construction illustrated in Fig. 3, the superheatertube consists of but a single tube 27 connected at its forward end withthe interior of the vaporizing tube through the cap 21. and having itsclosed rearward end 28 curved so as to form a deflecting surface. Thecurved end 28 is provided at its forward side with a gas or vapordischarge outlet'29 similar to the discharge orifice 26 shown in Figs. 1and 2. The entire length of the tube 27 is disposed in the same verticalplane as the lighting and vaporizing tubes, its rearward portionextending well within the space between the lighting and vaporizingtubes with its discharge orifice 29 at a substantial distance behind theopen end of the lighting tube. In this preferred construction the partsare so arranged that the discharge from the orifice 29 is in a directioninclined slightly above the horizontal. Any suitable hydrocarbon fuelmay be used, alcohol being preferred, the compartments 5 and 6 beingfilled through the outlets 7 and 8 in the manner previously described.

and one in which In operation, a light is formed at the upper end of thelighting tube 13. The heat from the flame of the lighting tube playsdirectly upon the superheater tube and the vaporizing tube 20 whichcauses the fuel fed through the wick 23 to be. vaporized, the vaporbeing discharged from the vaporizing tube through the tube 24 or tube27, escaping fromthe discharge orifice 26 or 29 as the case may be. Thevapor or gas during its passage through the tube 24,01 27 is heated to ahigh point being discharged in a superheated condition. c t v Due to thepositioning of the discharge orifice at a substantial distance behindthe open end of the lighting tube, the vapor orclosed, beingprovidedwith a cap member gas discharged therefrom carries with it a supply ofoxygen as it passes into the flame of the lighting tube, thus producinga Bunsen-burner flame.

During the use of the torch all portions of the deviceadjacent the flameproper, also the lighting flame, become heated. By disposing thesuperheater tube between the lighting and va orizing tubes and extendingthe same we 1 within the space between the said tubes, advantage may betaken of heat which is radiated from these heated parts. In ther words,the superheater tube is positioned so that any heat radiated from theseparts will be directed thereagainst to assist in superheating the vaporas it passes, from the vaporizing tube to the discharge orifice.

In the preferred form shown in Fig. 3, the utilization of all the heatfrom the flames as well as the heat radiated from the adjacent parts, isrendered still more effective than in the form illustrated in Figs. 1and 2 on account of the disposition of the entire superheater tube 27 inthe same vertical plane as the lighting and vaporizing tubes and byforming the rearward portion of the superheater tube as a deflectingsurface. Due to the curved rearward end of the superheater tube nearlyall the heat radiated from the heated portion of the lighting tube, aswellas the heat dissipated rearwardly from the flames, is deflectedalong the super- 7 heater tube thus directly enhancing the efficiency ofthe device. Further, heat which is not directly deflected along thesuperheater tube is prevented from passing rearwardly being .deflectedupon adjacent parts of the lighting and vaporizing tubes. thusindirectly increasing the efficiency of the torch.

It is thus seen that the invention provides a simple and convenient formof self-blowing torch, one in which oxygen is constantly supplied to thefuel flame to secure a Bunsen-burner effect, one in which the vaporizedfuel is superheated bycxtcnd' h the superheatcr tube well witbiu the rbetween the lightin and van operation is greatly enhanced by thepeculiar form and arrangement of parts.

I claim:

1. A self-blowing torch comprising a receptacle having a plurality offuel chambers, a vaporizin tube extending upwardly and forwardly fromone of said chambers and having a closed outer end, a wick'therein, anopen-ended lighting tube extending upwardly and forwardly from anotherfuel chamber also provided with a wick therein, the lighting tube beingdisposed in the same vertical plane as the vaporizing tube spaced fromand disposed entirely below the vaporizing tube with the tip of theformer terminating short of the outer extremity of the latter, a:superheater tube connected tothe vaporizing tube and extendingbackwardly a considerable distance and lying within the space betweenthe vaporizing and lighting tubes, the superheating tube having a vapordischarge port behind and spaced from the end of the lighting tube.

2. A self-blowing torch comprising a .receptacle having a plurality offuel chambers, a vaporizing tube extending upwardly and forwardly fromone of said chambers and having a closed outer end, a wick therein anopen-ended lighting tube extending upwardly and forwardly from anotherfuel chamber also provided with a, wick, the lighting tube beingdisposed in the same vertical plane as the vaporizing tube spaced fromand disposed entirely below the vaporizing tube with the tip of theformer terminating short of the outer extremity of the latter, asuperheater tube connected to the vaporizing tube and extendingbackwardly a considerable distance and lying within the space betweenthe vaporizing and lighting tubes whereby the same is partially heatedby radiation from said tubes the entire su erheater tube lying in thesame vertical p ane as the said vaporizing and f li'ghting tubes, theextremity of the superheater tu e being curved todeflect the heat 'fromth lighting tube and flamealongthe superheater tube, said curvedextremity having a vapor discharge port therein behind and spaced fromthe end of the lighting tube.

3. A self-blowing torch comprising a receptacle having a plurality offuel chambers, a vaporizing tube extending upwardly and forwardly fromone of said chambers and having a closed outer end, a wick therein, anopen-ended lighting tube extending upwardly and forwardly from anotherfuel chamber also provided with a wick, thelighting tube being disposedin the same vertical glane as the vaporizing tube spaced from andisposed entirely below the vaporizing tube with the tipof the formerterminating short of the outer extremity of the latter, a superheatertube connected to the vaporizing tube and extending backwardly aconsiderable distance and ,lyin

Within the space between the vaporizing an lighting tubes whereby thesame is partially heated by radiation from said tubes, the superheatertube being entirely disposed in the same vertical plane as the saidvaporizing and lighting tubes and having a closed end adjacent to whichis a vapor discharge port located behind and spaced from the open end ofthe lighting tube, the superheater tube being curved throughout aportion of its length at its closed extremity whereby to serve as adeflector.

In testimony whereof, I sign' my name. FRANCIS P. SGHMITT. Witness:

Enwm- O. JoHNs.

